本题目来源于试卷: Unity and Diversity A.1 Water，类别为 IB生物学
[单选题]
Which of the following is a hlo,sn )f (v-*wq/gcz reason for the retention of watmf /:5 )fwpy8of/k esper on Earth?
A. Different patterns of rainfall across the continents
B. The gravitational force of the Moon
C. Earth temperatures being high enough for evaporation
D. The force of gravity on Earth
参考答案: D
本题详细解析:
Gravity is responsible for holding water on Earth and is a fundamental( rw6 e4v1w6bivqiz1g factor in water retention within the planet's w i6 zev1r4wg(iq6b1v atmosphere and surface. Choice D is, therefore, correct.
Choice A is incorrect, as although rainfall is a part of the water cycle and is responsible for distributing water, it does not directly contribute to the retention of water on Earth.
Choice B is incorrect, as the moon's gravitational force regulates the tides of large bodies of water but does not directly contribute to water retention on Earth. Choice C is incorrect as water is lost from bodies of water on the surface of the Earth and evaporates into the atmosphere, which doesn't directly address water retention.
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